This blog has a bunch of tips and tricks learned or developed over the last 25+ years, plus my thoughts (and rants!) on various topics. Most of them pertain either to Linux, or to security and privacy. Articles should be tagged, and you should be able to click on a tag to find all articles having that tag.
The dates don’t necessarily mean much; the tags are more useful if you’re exploring. Some useful tags are #intro for newbie-friendly (I hope!) articles, #expert for stuff on the other extreme, etc.